Anyone else having issues with the SE shutting down unexpectedly? I just purchased a second-hand SE that has been upgraded to the latest iOS and have had three unexpected shutdowns in a week. The first time it happened, it had been charged to 100% and still connected to the charger. The other two times, the battery had been somewhat depleted but still with charge left. I've contacted the seller who agreed to send me another battery, but I'm suspecting the issue is with software since a battery test app indicated nothing wrong with the health of the battery. I've checked online and other users with this problem have said it could be temperature as well.